WO2022180338A1 - Weighing system for an apparatus able to deliver a predetermined mass, and corresponding method - Google Patents
Weighing system for an apparatus able to deliver a predetermined mass, and corresponding method Download PDFInfo
- Publication number
- WO2022180338A1 WO2022180338A1 PCT/FR2022/050325 FR2022050325W WO2022180338A1 WO 2022180338 A1 WO2022180338 A1 WO 2022180338A1 FR 2022050325 W FR2022050325 W FR 2022050325W WO 2022180338 A1 WO2022180338 A1 WO 2022180338A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- food product
- output shaft
- receiving member
- weighing system
- mass
- Prior art date
Links
- 238000005303 weighing Methods 0.000 title claims abstract description 70
- 238000000034 method Methods 0.000 title claims description 16
- 235000013305 food Nutrition 0.000 claims abstract description 109
- 230000003068 static effect Effects 0.000 claims abstract description 16
- 239000000843 powder Substances 0.000 claims description 34
- 230000005484 gravity Effects 0.000 claims description 24
- 239000008267 milk Substances 0.000 claims description 21
- 210000004080 milk Anatomy 0.000 claims description 21
- 235000013336 milk Nutrition 0.000 claims description 21
- 238000003860 storage Methods 0.000 claims description 17
- 238000001514 detection method Methods 0.000 claims description 15
- 238000006073 displacement reaction Methods 0.000 claims description 11
- 238000002360 preparation method Methods 0.000 claims description 7
- 230000008859 change Effects 0.000 claims description 5
- 210000000056 organ Anatomy 0.000 claims description 5
- 238000005192 partition Methods 0.000 description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
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- 239000011295 pitch Substances 0.000 description 7
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- 235000013350 formula milk Nutrition 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
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- 239000002245 particle Substances 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 239000002861 polymer material Substances 0.000 description 2
- 229920006324 polyoxymethylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 238000000518 rheometry Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 235000013361 beverage Nutrition 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G13/00—Weighing apparatus with automatic feed or discharge for weighing-out batches of material
- G01G13/16—Means for automatically discharging weigh receptacles under control of the weighing mechanism
- G01G13/22—Means for automatically discharging weigh receptacles under control of the weighing mechanism by tilting or rotating the weigh receptacle
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G7/00—Weighing apparatus wherein the balancing is effected by magnetic, electromagnetic, or electrostatic action, or by means not provided for in the preceding groups
- G01G7/02—Weighing apparatus wherein the balancing is effected by magnetic, electromagnetic, or electrostatic action, or by means not provided for in the preceding groups by electromagnetic action
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G17/00—Apparatus for or methods of weighing material of special form or property
Definitions
- TITLE WEIGHING SYSTEM FOR A DEVICE ABLE TO DELIVER A PREDETERMINED MASS AND CORRESPONDING METHOD
- the present invention relates to a system for weighing a predetermined mass of a food product for an apparatus capable of delivering this predetermined mass as a food product.
- the device is particularly intended for the preparation of a drink such as a baby bottle based on milk powder.
- weighing systems for beverage preparation.
- Many weighing systems include a conduit in which extends an endless screw which is driven in rotation by drive means. Worm screws are particularly suitable for dosing food powder such as milk powder for the preparation of baby bottles.
- the weighing system also comprises a hopper in which a quantity of milk powder is provided and is intended to feed the endless screw via an opening made in the wall of the duct. The rotation and/or the number of revolutions of the endless screw in the pipe makes it possible to deliver a predetermined quantity of milk powder to a food product outlet.
- the quantity of product delivered by the endless screw is not precise. Indeed, the delivery of milk powder is carried out on the basis of an average density thereof without taking into account the particle size or the granular rheology of the powders. Milk powders have different grain sizes and/or densities depending on the nutritional needs of the child. Furthermore, there are large variations in the mass of milk powder actually delivered due to variations in density in the dry state as well as in the mass of water absorbed by the powder depending on its storage conditions upstream of the hopper (inside the device and outside it). The presence of humidity in the milk powder considerably modifies its flow. In addition, when the auger stops, a quantity of powder escapes from the end section of the auger and is delivered after the auger motor stops.
- a milk powder weighing system comprising a measuring chamber and a plate which is free to rotate around an axis of rotation which is installed in the measuring chamber.
- a hopper is intended to supply the measuring chamber with milk powder.
- the plate is connected, at one end, to means for weighing the powder which are sensitive to the pressure and which are connected to an electronic control unit.
- the other end of the plate is connected to abutment means.
- the abutment means actuated by the cam then cause the rotation of the plate.
- the amount of powder is discharged through a discharge port of the measuring chamber.
- the quantity of milk powder desired is not precise because the measurement does not take into account the different particle sizes, densities and/or the granular rheology of the milk powder as stated above.
- this system is complex and expensive because it involves several organs to measure a precise mass and to deliver this precise mass.
- the weighing system comprises various elements for carrying out various actions, such as, among other things, a rod arranged at a distance from a magnet to determine a mass of a food to be weighed, of an organ reception of the food to be weighed which is connected to a counterweight and micro relay to maintain the receiving member for a determined time during payment.
- the counterweight allows the receiving device to be brought back into position.
- the distance between the rod and the magnet to determine the mass to be reached is a dimensional quantity.
- Such a system lacks reliability and is expensive.
- the object of the present invention is to provide a weighing system which is precise, reliable and economical.
- a weighing system intended to weigh and dump a predetermined mass of a food product, the device comprising:
- stepper electric motor carried by the frame and having an output shaft capable of adopt different positions along an axis of movement
- a food product receiving member which is movable along the axis of movement between a position for receiving the food product and a position for pouring the food product, the receiving member being configured to contain or retain a determined mass of the product food in the receiving position and to drop this mass in the dumping position,
- the receiving member being integral in movement with the output shaft and in that the weighing system is configured so that, in said receiving position, the receiving member and the food product that it contains or retains, apply a static torque to the output shaft
- the electronic control unit being configured so as to apply a resistive torque, for a predetermined mass of the product food, on the output shaft so that, when the static torque is at least equal to the resistive torque, the output shaft changes position.
- stall we mean a phenomenon of desynchronization of the rotor of a motor which can occur in the event of a shock or when a torque applied to the shaft of the motor is equal to or greater than the holding torque of the motor.
- the motor is no longer capable of maintaining the position and slips or stalls, causing it to change its pitch involuntarily.
- the invention uses this phenomenon to accurately detect the precise mass of the food product discharged into the receiving organ.
- the implementation and installation of such a system is simple and economical because physical phenomena classically occurring in engines are used.
- the motor torque measurement follows a linear law, which makes this solution an adaptive system.
- the stepper motor makes it possible to operate several actions/functions which are to fix the mass to be reached, to maintain the receiving member until the determined mass is reached, to switch the receiving device and bring it back into position.
- the stepper motor takes up little space which makes the system very compact.
- the stepper motor makes it possible to adjust an electromagnetic quantity which is much more reliable than a dimensional quantity.
- the system includes the following features individually or in combination:
- the electronic control unit is configured to control the displacement of the output shaft and the displacement of the receiving member between the receiving position and the dumping position when the mass of food product reaches a predetermined value.
- the predetermined mass of the food product contained in the receiving member and the receiving member have a center of gravity which is located at a predetermined distance from the axis of displacement A.
- the receiving member comprises connection means secured to a drive shaft, said drive shaft being coupled in rotation to the output shaft of the electric motor movable in rotation.
- the receiving member has the shape of a bucket.
- the receiving member has the shape of a receiving wall.
- the receiving wall has a flat or curved receiving surface.
- the frame comprises a platform provided with the opening passing through the wall of the platform on either side and through which the food product is intended to fall by gravity.
- the weighing system comprises detection means capable of detecting at least one position of the output shaft of the stepper motor, the detection means being connected to the electronic control unit.
- the predetermined mass is between 3g and 100g.
- the receiving member is mounted on the output shaft so that the center of gravity of the assembly, formed of the receiving member and the mass of food product, is defined in a plane passing through the axis of movement A which forms a predetermined advance angle with a horizontal plane passing through the axis of movement A of the output shaft.
- the dumping angle of the receiving device between the receiving position and the dumping position is between 0° and 180°.
- the weighing system includes a vibrating device intended to allow the total discharge of the food product from the receiving member into the discharge position.
- the invention also relates to an apparatus for the preparation of a drink based on a food product, the apparatus comprising a weighing system according to any one of the preceding characteristics.
- the latter comprises a food product storage tank and a mixing chamber intended to receive a predetermined mass of food product from the receiving member in the pouring position.
- the invention further relates to a method for weighing and dumping a predetermined mass of a food product by means of a weighing system, the weighing system comprising at least one electric stepper motor having an output shaft and a reception which is integral in movement with the output shaft, the method comprising the following steps:
- the method comprises the following steps and/or characteristics taken alone or in combination:
- the food product comprises milk powder.
- the electronic control unit controls the electric motor.
- Figure 1 is a front view of an apparatus intended to deliver a precise mass of a food product and to prepare a drink with this precise mass according to the invention
- Figure 2 is a perspective view of a weighing system of a precise and determined mass of a food product according to the invention
- Figure 3 illustrates in perspective, substantially below, an example of a receiving member of the food product according to the invention
- Figure 4 illustrates in perspective, substantially above, an example of a receiving member of the food product according to the invention
- Figure 5 shows, in a perspective view, an example of a motor installed on a frame of a weighing system and means for detecting at least one position of the output shaft of the motor according to the invention ;
- Figure 6 is a cross-sectional perspective view of an example of a weighing system according to the invention.
- Figure 7 shows an axial sectional view of the weighing system with a receiving member in a receiving position according to the invention
- Figure 8 is an axial sectional view of the weighing system with a receiving member in the dumping position according to the invention
- Figure 9 illustrates schematically and in axial section another embodiment of a receiving member of a weighing system having the form of a receiving wall for closing a receptacle according to the invention
- Figure 10 illustrates schematically and in axial section, another embodiment of a receiving member of a weighing system having the form of a receiving wall for closing a receptacle according to the invention
- Figure 11 is a partial cross-sectional view of the position detection means of the output shaft of the electric motor of the weighing system according to the invention.
- Figure 12 shows the different steps of a process for weighing and pouring a predetermined mass of food product according to the invention.
- Figure 1 an apparatus 1 for the preparation of drink based on food product such as powder, liquid, etc.
- the food product is preferably, but not exclusively, infant milk powder.
- the device is particularly intended to deliver a precise mass of the food product to prepare the drink.
- the device 1 comprises a frame 2, a food product storage tank 3 and a water tank (not shown).
- the frame 2 has a base 5 which is configured to receive a container 6 into which the drink is poured.
- the container 6 can be a bottle.
- the food product storage tank 3 is arranged above the base 5 along a longitudinal axis X (here vertical with reference to the plane of FIG. 1 and according to a situation of use of the device placed on a work surface ).
- the water reservoir is arranged in the present example downstream of the base 5 along a first transverse axis Y (here horizontal and perpendicular to the plane of FIG. 1).
- the first transverse axis Y is perpendicular to the longitudinal axis X.
- the apparatus comprises a weighing system 10 which is described later in this description
- the predetermined and precise mass of food product is delivered to a mixing chamber 7 into which water at a determined temperature is injected to promote the mixing of the food product (here milk powder and water. water can be injected under pressure.
- the mixing chamber 7 is arranged between the base 5 and the weighing system 10 along the longitudinal axis X.
- the mixing chamber 7 comprises a nozzle 8 intended to deliver the drink and which is arranged to distance from the base 5.
- the nozzle 8 is opposite the base 5 along the longitudinal axis X.
- the nozzle 8 extends along the longitudinal axis from a bottom of the chamber and in the direction of the base.
- the device 1 comprises a hydraulic circuit (not shown) which comprises a pipe comprising an inlet orifice connected to the water tank and an outlet orifice connected to the mixing chamber 7.
- the hydraulic circuit comprises a pump allowing the extracting water from the water tank and its c circulation in the pipe as well as means of heating the water. These heating means are arranged on the pipe and are arranged between the pump and
- the weighing system 10 is shown in Figure 2.
- the weighing system 10 is described in a situation of installation in the device with an orthogonal mark X, Y, T.
- the weighing system 10 comprises a frame 11 which is disposed in an enclosure 4 (shown in dotted lines) of the frame 2, the enclosure being located above the mixing chamber 7 along the longitudinal axis X.
- the frame 11 comprises a platform 12 with a first surface 13 defined in a plane which is orthogonal to the longitudinal axis X.
- the frame 11 comprises feet 14 which make it possible to stabilize the platform 12 and to maintain the platform 12 at a distance from a bottom of the enclosure 4.
- the feet 14 are in the present example four in number.
- Each foot 14 is elongated along the longitudinal axis between a first end 14a and a second end 14b.
- the first end 14a carries a sole 15 intended to rest on the bottom of the enclosure 4 and the second end 14b is fixed to the platform 12 by means of fixing members.
- the platform 12 comprises orifices 16 which each respectively receive the second end 14b of a foot 14.
- the fastening members comprise nuts which are each mounted in force in an orifice 16 and whose internal thread cooperates with external provided at the second end 14b of each foot.
- the fasteners may include other fasteners such as studs, screws, glue, solder, etc.
- the food product storage tank 3 is advantageously mounted on the platform 12. The storage tank 3 determines a storage volume for storing the food product.
- the platform 12 comprises an opening 17 which passes through the wall of the latter on either side along the longitudinal axis X.
- the storage tank 3 comprises an unloading orifice (not shown) which opens on the one hand, into the storage volume of the storage tank and on the other hand, in the opening 17 of the platform 12.
- closure means (not shown) of the unloading orifice are provided to occupy an open position and a closed position of the unloading port.
- the electronic unit is mounted in the device 1 and in particular on the frame 2.
- the closure means may comprise doors which pivot around an axis parallel to the plane of the first surface 13 of the platform 12 or at least a sliding door in the plane of the first surface 13.
- a hopper 19 extends, along the longitudinal axis X, from a second surface 20 (cf. FIG. 5) of the platform 12. Opening 17 opens into the hopper 19 which extends it.
- the hopper 19 has a frustoconical cross-section (in the plane formed by the longitudinal axes and the first transverse axis Y) which narrows in the direction of an outlet orifice 21 (cf. FIGS. 5 and 8) of the hopper 19
- the outlet orifice 21 of the hopper 19 is opposite (along the longitudinal axis X) to the opening 17 defined in the platform 12.
- the weighing system 10 comprises a receiving member 22 for the food product supplied by the storage tank 3.
- This receiving member 22 is movable along an axis of movement between a receiving position of the food product and a food product dumping position.
- the receiving member 22 moves following a rotation around the axis of movement.
- the receiving member 22 advantageously, but not exclusively, has the shape of a bucket. This cup shape allows better control of the reception of the food product and the contents.
- the receiving member 22 comprises a receiving wall 23, two lateral partitions 24 which extend from the side edges of the receiving wall 23 and an upstream partition 25 rising from an upstream edge of the wall of reception 23.
- the reception wall 23 is here the bottom of the reception member and is curved.
- the side partitions 24 are opposite along a second transverse axis T and include internal surfaces 24a defined in substantially parallel planes.
- the terms “upstream” and “downstream” are defined with respect to the first transverse axis Y.
- the internal surfaces 24a face each other.
- the upstream partition 25 is also connected to the upstream edges of the side partitions 24.
- the upstream partition 25 comprises an internal surface 25a defined in a plane which is perpendicular to the plane of the internal surfaces 24a of the lateral partitions 24.
- the upstream partition 25, the two lateral partitions 24 and the receiving wall 23 form a receiving volume of a quantity of foodstuff.
- At least the upstream partition 25 and the lateral partitions 24 each comprise a free edge 26 delimiting an opening 27 opening out into the reception volume of the reception member 22.
- the reception wall 23 comprises a curved and concave internal surface 23a which is oriented towards the opening 27 of the bucket.
- the inner surface 23 acts as a receiving surface for the food product.
- the weighing system 10 comprises an electric motor 30 intended to drive the movement of the receiving member 22 between the receiving position and the dumping position.
- Electric motor 30 is carried by frame 11 as shown.
- the frame 11 comprises a housing 31 (and. Figure 6) in which the motor is arranged in a removable manner. More specifically illustrated in Figure 6, the frame 11 includes a support wall 32 which extends from the second surface 20 of the platform 12 along the longitudinal axis X.
- the support wall 32 includes an internal surface 32a which is defined in a plane which is perpendicular to the second transverse axis T. Projections 33 extend from the internal surface 32a of the support wall 32 and at least partially delimit the housing 31 capable of receiving the electric motor 30.
- projections 33 have a circular section (along a plane XY (formed by the longitudinal axis X and the first transverse axis Y) and together form a cylindrical wall with an axis parallel to the second transverse axis T.
- a single cylindrical wall extends from the inner surface 33a of the support wall 32.
- the electric motor 30 comprises an output shaft 34 having an axis of movement A which is parallel to the second transverse axis T.
- the receiving member 22 is integral in movement with the shaft of motor output 34.
- the receiving member 22 comprises means 35 for connecting to the output shaft 34 of the motor 30.
- the receiving member 22 comprises two wings lateral 36 which extend the lateral partitions 24 downstream.
- the lateral wings 36 extend substantially along the first transverse axis Y.
- Each lateral wing 36 comprises an internal surface 36a which is defined in a plane perpendicular to the second transverse axis T.
- the internal surfaces 36a of the two side wings 36 face each other.
- the connecting means 35 comprise a hollow tube 37 which extends between the two lateral flanges 36 of the receiving member 22.
- a drive shaft 38 is coupled to the output shaft 34 of the motor 30 and is fixed in movement to the output shaft 34.
- the drive shaft 38 is coaxial with the axis of movement A.
- the drive shaft 38 is fixed to the receiving member 22 so that it moves simultaneously with the shaft 38.
- the drive shaft 38 is arranged inside the hollow tube 37.
- the drive shaft 38 has a diameter substantially equal to the internal diameter of the hollow tube 37.
- the connecting means 35 comprise ears connected to the receiving wall 23 and each ear comprises through holes along the second transverse axis T.
- the drive shaft 38 passes through the ears and is integral with those -C so as to be able to cause the movement of the receiving member.
- the electric motor 30 is a rotary stepper motor or a linear stepper motor.
- the use of a stepper motor is very economical.
- the motor 30 is a rotary stepper motor.
- the output shaft 34 performs a rotation around the axis of movement A.
- the receiving member 22 pivots around this axis of movement A.
- a stepper motor allows controlled and precise rotation of the output shaft and is simple to drive.
- the stepper motor includes at least one rotor and one stator.
- the rotor is coupled to the output shaft 34.
- the stator carries at least two electric coils or electromagnets which produce a magnetic field.
- the magnetic field is generated by a current which appears when the motor is supplied with a predetermined voltage.
- the direction of a magnetic field flowing in the coils of the stators causes the rotation of the rotor.
- the output shaft 34 of the electric motor 30 rotates through a constant angle in response to each electric pulse allowing it to adopt different angular positions which are called pitches.
- the motor 30 can have a determined number of steps.
- the angle can be between 0.9° and 45°.
- the output shaft 34 of the motor can achieve between 8 and 400 steps per revolution depending on the motors.
- the electric stepper motor 30 may comprise a permanent magnet stepper motor, a variable reluctance stepper motor or a hybrid stepper motor.
- the electric motor 30 is a hybrid or permanent magnet stepper motor with a constant reluctance.
- the hybrid stepper motor includes permanent magnets and allows an increase in the reluctant torque compared to a stepper motor without permanent magnets.
- the hybrid motor has better efficiency and needs less current to obtain the same torque.
- the motor 30 is connected to the electronic control unit 18 intended to control the latter.
- the electronic control unit 18 also makes it possible to supply the motor 30.
- the electronic control unit 18 therefore comprises a supply module intended to supply the electric motor with voltage and a module for controlling the rotation of the output shaft 34 of the electric motor.
- the electronic control unit 18 is connected to a source of electrical energy such as the domestic network, for example by electrical cables from the device 1 (not shown).
- Figure 7 illustrates the receiving member 22 in the receiving position.
- the receiving member 22 is configured to contain or retain a determined mass of the food product.
- the receiving member 22 is of course empty.
- the receiving surface (internal surface 23a) of the receiving member 22 is substantially opposite the opening 17 through which the food product is intended to fall by gravity into the receiving member 22.
- the free edge is defined in a plane perpendicular to the longitudinal axis and this plane is parallel to a plane P1 passing through the axis of displacement A of the output shaft 34. More precisely still, the center of gravity CGV of the empty receiving member 22 is defined in the plane P1 passing through the axis of movement of the output shaft 34.
- the CGV center of gravity of the receiving member 22 is determined by the barycenter of the elements that constitute it.
- the center of gravity of the receiving member 22 is equal to the center of gravity CGV.
- Figure 8 illustrates the receiving member 22 in the dumping position.
- the receiving member 22 In the dumping position, the receiving member 22 is configured to drop this determined mass.
- the receiving surface In the dumping position, the receiving surface (internal surface 23a) is at a distance from the opening 17.
- the receiving wall 23 is facing and here substantially in contact with the second surface 20 of the platform 12.
- the tilt angle is between 0° and 180°.
- the tilt angle is between 60° and 135°.
- the weighing system 10 comprises a vibrating device (not shown) intended to allow the total discharge of the food product (or cleaning) from the receiving member 22 in the discharge position.
- This vibrating device is particularly advantageous when the pivot angle is less than 170° relative to the horizontal plane P1.
- the vibrating device is electrically connected to the electronic control unit 18 which drives it when the latter is informed of the dumping position.
- the receiving member 22 comprises the receiving wall 23' which is integral in movement with the output shaft 34 of the electric motor 30.
- the receiving wall 23 ' is intended to close or block a receptacle 47 which is also integral in movement with the output shaft 34 of the motor 30.
- the receiving wall 23' carries the receiving surface 23a which is intended to receive the food product falling by gravity of the storage tank 3 and for weighing the mass of the food product as described below.
- the receptacle 47 receives the food product after moving the receiving wall 23' into the pouring position once the quantity of food product has been weighed. More precisely, the receiving wall 23' is integral in rotation with the output shaft 34 of the motor 30.
- the receiving wall 23' can be linked directly to the output shaft 34 via connecting means 35 (ears, tubes hollow) or can be connected to the drive shaft 38 (via the connecting means 35) which is coupled to the output shaft 34.
- the receptacle 47 has an opening 47a which is delimited by walls 47b and a bottom 47c from which rise the walls 47b.
- the receiving wall 23' is arranged at the level of the opening 47a to close the receptacle 47.
- the receiving wall 23' also has dimensions substantially equal to those of the opening 47 while allowing its tilting inside the receptacle 47 when the mass of food product is reached.
- the receptacle 47 is arranged above the mixing chamber 7 along the longitudinal axis X.
- the center of gravity CGV of the receiving member 22 is defined in the horizontal plane P1 passing through the axis of displacement A of the 'output shaft 34.
- the CGV center of gravity of the receiving member corresponds to the center of gravity of the receiving wall 23'.
- the receiving surface 23a is flat.
- the receiving surface 23a could have a concave shape to better retain the food product. Such a configuration makes it possible to measure a greater quantity of food product.
- the receiving member 22 is made of a polymer material or a composite material with a polymer matrix.
- a material is Polycarbonate (PC) or Acrylonitrile Butadiene Styrene (ABS) or a mixture thereof. These polymer materials have the advantage of being very light while being robust.
- the material can also be a Polypropylene (PP), a Polyoxymethylene (POM), a Polyamide (PA), etc.
- a stepper electric motor is subjected to a resistive torque (or reluctant torque) and a synchronous torque.
- the reluctant torque results from the resistance to the passage of a magnetic flux in the stator and rotor.
- the electric motor 30 is supplied with a predetermined voltage to maintain each angular position. This predetermined voltage is a function of the resistive torque applied to the output shaft 34 of the electric motor 30.
- the weighing system 10 is configured to determine the mass of the food product by stalling the motor, that is to say to trigger the change of pitch or the angular pivoting while resistive torque is applied to the output shaft 34 by the electronic control unit 18.
- the weighing system 10 is configured so that, in said receiving position, the receiving member 22 and the food product that it contains or retains, apply a torque static on the output shaft 34, and that the electronic control unit 18 is configured so as to apply a resistive torque to the output shaft 34.
- the electric motor 30 the output shaft 34
- the resistant torque corresponds to a predetermined mass of the food product. This predetermined mass is that which must be poured into the mixing chamber 7 to prepare the drink.
- the value of the predetermined mass is between 3g and 100g. Preferably, the value is 8g.
- the receiving member 22 is configured so that the food product 39, here the milk powder, after unloading (from the storage tank 3) forms a slope in or on the receiving member 22.
- the predetermined mass of food product 39 and the receiving member 22 have a center of gravity CGP which is located at a predetermined distance d from the axis of displacement A. The distance d is almost constant.
- the CGP center of gravity of the assembly is arranged below the center of gravity (CGV) of the receiving member 22 and below the following horizontal plane P1 the longitudinal axis X.
- the distance d multiplied by the weight of the mass of the assembly (formed by the mass of food product and that of the receiving member), brought back to the center of gravity CGP constitute a mechanical moment applied to the output shaft 34 of the motor 30. The moment becomes the static torque applied to the output shaft 34 of the motor 30.
- the receiving member 22 (with the receiving wall 23 ') defines a beam having an angle relative to a horizontal plane passing through the axis of movement A of the motor 30.
- the receiving member 22 is mounted on the output shaft 34 according to a predetermined advance angle a (alpha). This angle a is between 1.8° and 8°.
- a berm of milk powder is disposed on the receiving surface 23a of the receiving wall 23'.
- the center of gravity CGT of the slope-shaped food product is disposed above the receiving surface 23a.
- the point of application of the force F exerted by the embankment is defined on the receiving surface 23a and passes through the center of gravity CGV' of the receiving member 22.
- the receiving member 22 is connected to the shaft output 34 so that the center of gravity of the CGP assembly (powder and receiving member 22) is above the horizontal plane P1 passing through the axis of movement of the engine.
- the center of gravity CGP is defined in a plane passing through the axis of displacement A which forms the angle of advance a with the plane P1. In this way, when the motor stalls, the static torque increases rather than decreases. The moment (F * d * cos(a)) increases without increasing the mass of the food product. Such an arrangement makes it possible to improve the sensitivity of the weighing system.
- the weighing system 10 comprises detection means 40 capable of detecting at least one angular position of the output shaft 34 of the electric motor 30.
- the detection means 40 are connected to the unit control electronics 18 which is configured to act on the motor 30 in the event of detection of a change in pitch or angular position of the motor.
- the detection means 40 comprise an emitter of a light beam (visible or not visible) and a receiver of the light beam. The receiver is arranged facing the transmitter.
- the transmitter and the receiver are connected to the electronic control unit 18.
- the detection means comprise an optical fork 41 comprising a first lug 41a on which the transmitter is mounted and a second lug 41b on which is mounted the receiver.
- the light beam may be an infrared beam.
- the detection means 40 comprise an obstacle member 42 which is integral with the output shaft 34.
- This obstacle member 42 is intended to be inserted in the path of the beam light depending on the angular position of the output shaft 34.
- the obstacle member 42 comprises a central axis disk coaxial with the axis of movement A of the output shaft 34 and integral in rotation with the output shaft 34. In this way, when the motor 30 stalls (the motor changes pitch), the disc pivots at the same time as the output shaft 34.
- the disc comprises at least a first slot 43 which extends radially from the periphery 44 of the disc towards the central axis of the disc. Slot 43 is intended to be crossed by the light beam (as shown in dotted lines in FIG. 11).
- first leg 41a and the second leg 41b extend respectively on either side of a portion of the disc 42 along the transverse axis T.
- the optical fork 41 is installed in a housing 45 which is formed in the platform 12 of the frame 11.
- the housing 45 opens onto the first surface 13 and onto the second surface 20 of the platform.
- a portion of the disk extends through the housing 45 and transversely between the transmitter and the receiver.
- the obstacle member 42 here the disk, is easy to install and does not introduce any parasitic torque on the output shaft 34 of the motor.
- the obstacle member 42 comprises a cam.
- the electronic control unit 18 controls the maintaining of the position of the output shaft 34 of the motor by application of the resistive torque.
- the receiving member 22 is supplied with food product.
- the light beam is interrupted, this means that the light beam scans a solid surface of the disk and that the output shaft 34 has pivoted by at least one step (first angular position).
- the electronic control unit 18 drives the output shaft 34 to drive the receiving member 22 into the dumping position.
- the detection means 40 are capable of detecting another angular position (second position) of the output shaft 34 of the electric motor 30.
- the disk comprises a second slot 46 visible in FIG. 6 intended to allow the detection of the second position of the output shaft 34 and in particular of the receiving member 22.
- the first slot 43 and the second slot 46 are arranged at 180° to each other. This second slot 46 acts as an end-of-travel detection element for the receiving member 22 in the dumping position.
- the method 100 includes a step of providing 110 a food product. During this step, the food product is placed in the storage tank 3 located above the system weighing 10. Preferably, the food product comprises an infant milk powder.
- the method comprises a step 120 of unloading a quantity of food product onto or into the receiving member 22. In particular, the food product is unloaded so as to form a slope on the receiving surface 23a of the receiving member. reception 22.
- the reception surface 23a is flat or hollow as described previously.
- the electronic control unit 18 sends a control command to the closure means to open the unloading orifice of the storage tank 3.
- a quantity of food product is thus unloaded onto or into the reception 22 via the opening 17 of the platform 12 and of the hopper 19 which guides the food product towards the reception member 22.
- the food product 39 can be guided in the reception volume of the reception member 22 in the bucket case.
- the milk powder is poured continuously or discontinuously onto the receiving surface 23a of the receiving member 22.
- the method includes a step 130 of weighing a predetermined mass of the food product in the receiving member 22.
- This step 130 consists of stalling the motor.
- the weighing step 130 includes a sub-step in which the electronic control unit 18 applies a resistive torque to the output shaft 34 of the motor 30.
- This resistive torque is a function of the supply voltage.
- a voltage of 12V which corresponds to a resistant torque of 16 mNm is applied to the motor 30.
- This resistant torque corresponds to a mass of powder of approximately 8 g.
- the output shaft 34 pivots and changes pitch. As long as the mass of milk powder in the receiving member 22 (or on the receiving surface 23a) with the mass of the receiving member does not reach this predetermined value, the milk powder continues to discharge into the receiving organ 22.
- the method 100 includes a step 140 of dumping the mass of weighed powder.
- the output shaft 34 changes pitch or angular position without action from the motor itself or control from the electronic control unit 18.
- the obstacle member 42 here the disc cuts the light beam between the transmitter and its receiver.
- the detection means 40 and in particular the optical fork 41 sends a control signal relating to the position of the output shaft 34 to the electronic control unit 18.
- the latter sends a control command to the motor 30 to drive the rotation of the output shaft 34 and the receiving member 22 into the dumping position.
- the method comprises a step 150 of stopping the unloading of the food product into the receiving member 22.
- the electronic control unit 18 sends a control command to the shutter means to close the storage tank discharge port 3.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Weight Measurement For Supplying Or Discharging Of Specified Amounts Of Material (AREA)
- Food-Manufacturing Devices (AREA)
- Measuring Volume Flow (AREA)
- Air Transport Of Granular Materials (AREA)
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP22710684.6A EP4298411A1 (en) | 2021-02-25 | 2022-02-23 | Weighing system for an apparatus able to deliver a predetermined mass, and corresponding method |
KR1020237029697A KR20230148174A (en) | 2021-02-25 | 2022-02-23 | Metering system and corresponding method for a device capable of delivering a predetermined mass |
JP2023550583A JP2024514746A (en) | 2021-02-25 | 2022-02-23 | Weighing system and corresponding method for devices capable of delivering a given mass |
CN202280015829.1A CN116940811A (en) | 2021-02-25 | 2022-02-23 | Weighing system for a device capable of delivering a predetermined mass and corresponding method |
US18/278,284 US20240133732A1 (en) | 2021-02-25 | 2022-02-23 | Weighing system for an apparatus able to deliver a predetermined mass, and corresponding method |
AU2022227963A AU2022227963A1 (en) | 2021-02-25 | 2022-02-23 | Weighing system for an apparatus able to deliver a predetermined mass, and corresponding method |
IL305365A IL305365A (en) | 2021-02-25 | 2022-02-23 | Weighing system for an apparatus able to deliver a predetermined mass, and corresponding method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR2101830A FR3120123B1 (en) | 2021-02-25 | 2021-02-25 | WEIGHING SYSTEM FOR AN APPARATUS ABLE TO DELIVER A PREDETERMINED MASS AND CORRESPONDING METHOD |
FRFR2101830 | 2021-02-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022180338A1 true WO2022180338A1 (en) | 2022-09-01 |
Family
ID=76523020
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2022/050325 WO2022180338A1 (en) | 2021-02-25 | 2022-02-23 | Weighing system for an apparatus able to deliver a predetermined mass, and corresponding method |
Country Status (9)
Country | Link |
---|---|
US (1) | US20240133732A1 (en) |
EP (1) | EP4298411A1 (en) |
JP (1) | JP2024514746A (en) |
KR (1) | KR20230148174A (en) |
CN (1) | CN116940811A (en) |
AU (1) | AU2022227963A1 (en) |
FR (1) | FR3120123B1 (en) |
IL (1) | IL305365A (en) |
WO (1) | WO2022180338A1 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1549301A1 (en) | 1965-06-24 | 1970-12-17 | Valente Carlo E | Magnetic dosing device, especially for the automation of coffee grinders |
DE29620108U1 (en) | 1996-11-19 | 1998-03-19 | Systa System-Automation GmbH, 38106 Braunschweig | Container scales |
EP1145627A2 (en) * | 2000-04-10 | 2001-10-17 | Lely Enterprises AG | A feed metering device |
-
2021
- 2021-02-25 FR FR2101830A patent/FR3120123B1/en active Active
-
2022
- 2022-02-23 KR KR1020237029697A patent/KR20230148174A/en unknown
- 2022-02-23 US US18/278,284 patent/US20240133732A1/en active Pending
- 2022-02-23 IL IL305365A patent/IL305365A/en unknown
- 2022-02-23 AU AU2022227963A patent/AU2022227963A1/en active Pending
- 2022-02-23 WO PCT/FR2022/050325 patent/WO2022180338A1/en active Application Filing
- 2022-02-23 JP JP2023550583A patent/JP2024514746A/en active Pending
- 2022-02-23 CN CN202280015829.1A patent/CN116940811A/en active Pending
- 2022-02-23 EP EP22710684.6A patent/EP4298411A1/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1549301A1 (en) | 1965-06-24 | 1970-12-17 | Valente Carlo E | Magnetic dosing device, especially for the automation of coffee grinders |
DE29620108U1 (en) | 1996-11-19 | 1998-03-19 | Systa System-Automation GmbH, 38106 Braunschweig | Container scales |
EP1145627A2 (en) * | 2000-04-10 | 2001-10-17 | Lely Enterprises AG | A feed metering device |
Also Published As
Publication number | Publication date |
---|---|
FR3120123A1 (en) | 2022-08-26 |
EP4298411A1 (en) | 2024-01-03 |
KR20230148174A (en) | 2023-10-24 |
JP2024514746A (en) | 2024-04-03 |
US20240133732A1 (en) | 2024-04-25 |
AU2022227963A1 (en) | 2023-09-07 |
IL305365A (en) | 2023-10-01 |
FR3120123B1 (en) | 2023-06-02 |
CN116940811A (en) | 2023-10-24 |
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